Improvement in plows



y shape of various mold-boards.

UNITED STATES ROSS JOHNSON, OF LAWRENCE, KANSAS.

IMPROVEMENT IN PLOWS.

Specification forming part of Letters Patent No. 118,945, datedSeptember 12, 1871.

To all whom it may concern.-

Be it known that I, Ross JOHNSON, of Lawrence, in the county of Douglasand in the State of Kansas, have invented certain new and usefulImprovements in Subsoil Attachments for Plows; and I do hereby declarethe following to be a full, clear, and exact description thereof,reference being had to the accompanying drawing and to the letters ofreference marked thereon making a part of this specication.

My present invention is intended as an im provement upon the subsoilattachment for plows patented by me May 10,1870. This first subsoilattachment was found to be deficient in not being able to adapt thesubsoiling to suit the character of team which might happen to beemployed-in other words, it lacked an arrangement by which thegooseneck-hook and barb could be raised or lowered at will with facilityand without changing the horizontal set of the barb. In the old casethere was also too much strain and twisting force brought to bear uponthe small bar or brace under the plow, particularly when working in ahard substratum of earth, or when obstructions were en countered by thebarb. In the present improvement I have obviated these difficulties; andthe nature of my invention hence consists, irst, in the means for makingthe subsoiler adjustable up and down, and also backward and forward; andsecond, in the construction and arrangement of the neck of the siibsoilvhook.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the anneXed drawing.

Figure l is a side View of a plow with my subsoil attachment, and Fig. 2is a rear view of the subsoil attachment.

A represents an upright bar, which may be straight, curved, or angular,as may be found best adapted to the variety of construction and Thisupright bar is, in fact, merely designed as a rear appendage or ribplaced upon the under or back surface of the mold-board edgewise, toreceive connection with the subsoil-hook D, and also with the crossbraceE. The shank or subsoil-hook D is connected with the upright A by meansof a bolt, a, the shank resting upon the bar B. There being a number ofholes through shank D, as well as on the upright, as shown, the shankmay be adjusted up and down and backward and forward. The cross-brace Eextends from the curve ofthe gooseneck or hook diagonally, or it may bebowed to a point near the upper end of the upright bar A, thus bearingthe upward leverage or pressure, and consequently relieving the twistingstrain on the small bar or brace B under the plow. The brace E is alsomade adjustable at both ends, as shown. The end of the hook D in thisimprovement sits edgewise in stead oftlat, as before, and will,therefore, likewise hold the instrument much more firmly and of itselfbear a greater strain in the process of plowing. The upright bar A maybe made, at

will, to rest against any portion of the rear or back surface of themold-board and appendages; as, for instance, against the iron standardfound in all plows, and forming really a part of the mold-board, as thelatter is either cast with or bolted to it in most every variety ofplows, both iron and steel. The projection Gr is designed to be acontinuation ofthe straight end of the subsoiler, only turned up inorder to form a brace against the mold-board.

It will be particularly noticed that I use, under all circumstances, themold-board or some of the iron work lconnected therewith as the point ofresistance to the upward strain in the process of subsoiling.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The combination, with the mold-board of a plow, of the shank orsubsoil-hook D, upright bar A, and brace E, all constructed and arrangedas described, so that the mold-board will form the point of resistanceto the upward strain of the subsoiler, substantially as herein setforth.

In testimony that I claim the foregoing I have hreunto set my hand this30th day of January, 1 71.

ROSS JOHNSON.

Witnesses E. D. HAMMOND, J. W. ADAMS.

